Franz thuringer



' UNITED ST TES FRANZ THURINGER, OF

PATENT OFFICE.

NUREMBERG, GERMANY, ASSIGNOR TO HERMANN RICHTER, OF SAME PLACE.

PROCESS OF PRODUCING COLORED GELATINE PICTURES.

SPECIFICATION forming part of Letters Patent No. 542,785, dated July 16, 1895. Application filed March 2,1895. Serial No. 540,346. (No specimens.) Patented in Germany July 14, 1891,No. 61,051.

To all whom it may concern.-

Be it known that I, FRANZ THURINGER, a citizen ofthe German Empire, residing at Nuremberg, in the Kingdom of Bavaria, in said Empire, have invented certain new and useful Improvements in Processes of Producin g Colored Gelatine Pictures, (for which Letters Patentwere granted to me in Germany, No. 61,051, dated July 14, 1891,) of which the following is a specification.

It is .well known that gelatine in thin sheets is well adapted, on account of its transparency and toughness, for the production of transparent colored pictures, and has been used heretofore, printed in bronze colors, forvarious purposes. Owing to the sensitiveness of gelatine to moisture, however, these gelatine pictures curl up when subjected to the breath and change easily when subjected to moisture. Consequently pictures of larger size in many colors could not be produced, as the proper registering of the colors could not be obtained on the sheets.

The object of this invention is to furnish an improved process of producing colored pictures on gelatine sheets, which consists in preventing the distortion of the sheet during printing by pasting the same upon an unchangeable foundation or backing, printing in colors on the sheet, and preserving'the finished picture against moisture by atransparent waterproof coating on both its sides. For the backing of the gelatine sheets the Well-known transfer-paper, which is, also used in the manufacture of transfer-pictures to great advantage, is used. This paper is provided on one side with film formed of a solution of starch, albumen, and gum, and posapplied in the first place to the gummed side of the transfer-paper. Upon this coating of collodion and varnish a layer of gelatine is spread, on which the pictures are printed in colors after it is dry. As the transfer-paper furnishes a foundation for the gelatine sheet, the latter is not subject to changes during the printing of the colors, so that they can be made to register accurately on the sheet. In place of printing on the gelatine sheet the colors may also be printed directly onto the coating of the transfer-paper and the layer of gelatine applied over this printed coating.

After the colors are dried the printed gelatine sheet or the printed coating of the transfer-paper, as the case maybe, is again covered with a coating of collodion and varnish,so

that the picture is thereby protected on both sides with a waterproof coating. After the geletine sheet is perfectly dry the transferpaper which has served as the backing or foundation of the same is moistened from the back and drawn off from the finished gelatine picture, leaving its adhesive film and the coating on the sheet. 'When stout transferpaper is used, pictures'up to the largest size tating paintings on glass.such as are employed, for instance, in the like.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The process herein described of making colored gelatine pictures, which consists in coating a sheet of transfer-paper with a waterproof transparent coating, mounting the gelatine-sheet on said coated backing, printing the colors on the so-mounted gelatine-sheet, and then applying another transparent Water-proof coating to the face of the printed sheet, and lastly, removing the transfer-paper by moistening the same, substantially as set forth.

In testimony that I claim the foregoing as magic lanterns and myinvention I have signed my name in presence of two subscribing witnesses.

FRANZ TI-IURINGER. Witnesses:

ALEX WIELE, MAX SoHEIDIe. 

